56
No.
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Error detection contents
The bend remedial
roller temperature is
detected with a
thermistor.
When the temperature
has dropped about
10
°
C from READY.
The TPS0220-001-H
circuit board has a
sensor for detection of
the ambient
temperature.
When detection by this
sensor has become
impossible.
The thermal head has a
built-in thermistor, and
the density is kept
constant according to
the temperature of the
head.
When head temperature
exceeds 70
°
C
This unit has two
EEPROMs.
Treatment contents
This is a defect of the heater control system.
1) Analog circuit board: Defect of the circuit performing A/D
conversion for the thermistor.
2) Heater protector circuit board.
3) Bend remedial roller unit: Defective thermistor etc.
Thermistor: Measure with a tester - about 220 k
Ω
at
normal temperature and about 1 k
Ω
at 200
°
C.
4) Measure the thermostat with a tester and confirm a
value of about 2 or 3
Ω
. The resistance is infinite in case
of abnormalities.
5) Defective power supply unit.
1) Thermistor: Measure with a tester - about 220 k
Ω
at
normal temperature and about 1 k
Ω
at 200
°
C.
2) When the thermistor is normal: Defective analog power
circuit board, CPU circuit board.
1) Exchange the thermistor circuit board.
2) Analog power circuit board, CPU circuit board.
3) When the circumference temperature is 5
°
C or less.
1) Does the cooling fan operate? Check that the filters on
both sides are not clogged. In case of clogging, clean or
exchange the filters.
2) Does the thermal head cooling fan operate normally?
Perform cleaning.
3) In case of reoccurrence, the thermal head is defective.
Exchange the head.
1) When the head EEPROM is defective.
2) When the EEPROM on the CPU circuit board is
defective.
Exchange parts
* Heater protector
circuit board
* Heat roller unit
* Main circuit board
* Heater protector
circuit board
* Heat roller unit
* Heat roller unit
* Power supply
unit
* Heat roller unit
* Main
circuit board,
Thermistor
circuit board
* Raise circumference
temperature.
* Cooling fan,
Filter
* Thermal head
cooling fan
* Thermal head
* Main circuit
board
* Thermal head.
Error item
RR Overheat
Bend remedial
roller overheat
RR Broken
Defective bend
remedial roller
RR Sensor Broken
Defective bend
remedial roller
thermistor
Overcool
Overcooling
Head Overheat
Head overheat
EEPROM Broken
Defective EEPROM
Printer CFG Err
MG Unconnected
MG Mechanical
MG Hardware
MG Write
MG Read
MG Communicate
EXT.Unconnected
EXT.SW Setting
EXT.Jam
EXT.Communicate
1) When the temperature
does not rise even
after about 30 sec.
have passed since
heater ON.
2) When the temperature
at the time of READY
is about 40
°
C lower
than the set
temperature.
Refer to subsection 3.4 in "MGI encode unit" and subsection 4 in "Large-type IC unit"
The temperature of the bend
remedial roller is detected with
a thermistor, and an error is
caused when this temperature
exceeds about 220
°
C.
When this temperature is
exceeded, the thermostat
operates and the circuit is cut.
This is a defect of the heater control system.
1) Analog power circuit board: Defect of the circuit
performing A/D conversion for the thermistor.
2) Heater protector circuit board: Only the 200 V system is
confirmed. The 100 V system is passed through.
3) Heat roller unit: Defective thermistor etc.